The Mode! 145 20 MHz Pulse/Function Generator has the versatility of output found in a function generator, plus the pulse characteristics of a pulse generator. It is a precision source of sine, triangle, balanced square, positive square and negative square waveforms, a source of dc levels and a source of normal and inverted pulses. All are front panel and remote control variable in frequency from 0.0001 Hz to 20 MHz (periods from 50 ns to 10,000s). Pulse widths are variable from 25 ns to 1 ms and pulse delays variable from 50 ns to 10 ms. Double pulses (two pulses per period! are also available with variable time between pulses. The logical complement of the pulse is selectable and either pulse or complement are output simultaneously as ECL, ECL, TTL, TTL and variable amplitude and offset pulses. The amplitude controllable output of either waveform or pulse can be varied up to 30 volts peak-to-peak (open circuit) and attenuated up to 80 dB. DC voft3ge or dc offset of signal is variable by front panel-control and by external control between ±15 volts (open circuit). The outputs are also triggerable for one or multiple cycles by front panel ' switch or remote signal. A voltage representing generator frequency and a TTL level sync pulse at the frequency of the generator are auxiliary outputs.